Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 5th Sem 2151603 Computer Graphics Previous Question Paper
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?V (NEW) EXAMINATION ? WINTER 2020
Subject Code: 2151603 Date: 03/02/2021
Subject Name: Computer Graphics
Time: 10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) What is Computer Graphics? List various applications of
03
Computer Graphics.
(b) How much time is spent scanning across each row of
04
pixels during screen refresh on a raster system with
resolution of 1280 X 1024 and a refresh rate of 60 frames
per second?
(c) Write the differences between random scan display and
07
raster scan display.
Q.2 (a) Explain Odd-Even rule.
03
(b) What are the differences between flood-fill and boundary
04
fill algorithms?
(c) Write circle generation algorithm and explain it with
07
example.
Q.3 (a) Explain Translation transformation.
03
(b) Apply the shearing transformation to square with A(0,0),
04
B(1,0), C(1,1) and D(0,1) as given below:
1) Shear parameter value of 0.5 relative to line Yref = -1
2) Shear parameter value of 0.5 relative to line Xref = -1
(c) Derive 2D reflection matrix about arbitrary line.
07
Q.4 (a) Explain Scaling transformation.
03
(b) Derive 2D transformation matrix for rotation about
04
arbitrary point.
(c) Obtain the mirror reflection of the triangle ABC about the
07
line passing through the points (4, 6) and (10,15) where
A,B,C have coordinate values (0,10),(0,50) and (-20,30)
respectively.
Q.5 (a) Write difference(s) between parallel projection and
03
perspective projection.
(b) Let r(t)=(t,t2) for 0<=t<=1 & Let n(t)=(2t+1,t3+4t+1) for
04
0<=t<=1. Notice that r(1)=(1,1)=n(0) for r and n join with
C0 continuity:-
1] Do n(t) and r(t) meet with C1 continuity at the join
point?
2] Do n(t) and r(t) meet with G1 continuity at the join
1
point?
(c) Derive 3D transformation matrix for rotation about line
07
which is parallel to any one of the co-ordinate axis.
Q.6 (a) Define following terms:
03
1) Parametric Continuity
2) Geometric Continuity
(b) What is projection? List out types of projection with
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diagram.
(c) Explain the Cohen Sutherland line clipping algorithm.
07
Q.7 (a) Discuss two approaches used to determine hidden surfaces.
03
(b) Briefly explain Back Face Detection algorithm.
04
(c) What is window and view-port? Retrieve equations for the
07
scaling factors to map the window to view-port in 2D
viewing system.
Q.8 (a) What is depth buffer method?
03
(b) List out properties of Bezier Curve.
04
(c) Explain RGB Color model in detail.
07
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This post was last modified on 04 March 2021